Validation of Turbulence Models in STAR-CCM+ by N.A.C.A. 23012 Airfoil Characteristics
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Authors
Hu, Junling
Xiong, Xingguo
Ren, K.
Zhang, L.
Wei, J.
Issue Date
2009-04-03
Type
Article
Language
Keywords
Engineering , Mechanical engineering , Electrical engineering , Airfoil , Turbulence , Computer modeling
Alternative Title
Abstract
Computational fluid dynamics (CFD) provides the helicopter designer with an analysis tool capable of evaluating complex rotary wing aerodynamics. There is a wide range of turbulence models developed to simulate the viscous turbulent aerodynamics flow, however, more accurately and efficiently modeling turbulence is still a challenge in today’s CFD research and applications. Turbulent transport processes are strongly problem-dependent, which can only give an approximate description with a particular set of empirical constants for a certain range of flows. It is also reported that the same turbulence model predict very different results in different commercial CFD codes. Therefore, the development and application of turbulent models rely on experimental data for validation. In this project, three turbulence models, which are K-ε, K-ω and Reynolds Stress Transport turbulence models are tested and validated in the state-of-art CFD code STAR-CCM+ by simulating the turbulent flow over an N.A.C.A. 23012 airfoil with an N.A.C.A. 23012 external-airfoil flap. The predicted results are compared with wind tunnel data for flow over the airfoil with an external-airfoil flap at different attack angle and flap deflections.
Description
© ASEE 2009
Citation
Publisher
ASEE